81210

Appears in sequences

• Number of tilings of 2 X n rectangle with polyominoes, each of which has area = # of adjacent polyominoes.at n=21A044043
• An eighth of the product of three integers surrounding the (n+1)-st prime, minus half of the product of the 3 numbers surrounding n+1.at n=22A141535
• a(n) = 225*n^2 - 15.at n=18A158559